A025258 - cp's OEIS frontend

A025258 a(n) = a(1)a(n-1) + a(2)a(n-2) + ... + a(n-3)*a(3) for n >= 4, with initial terms 1, -1, 1, 1.

n	a(n)
1	1
2	-1
3	1
4	1
5	0
6	0
7	2
8	3
9	1
10	2
11	11
12	17
13	12
14	25
15	81
16	127
17	134
18	276
19	696
20	1118
21	1492
22	3005
23	6607
24	10935
25	16766
26	33047
27	67249
28	114611
29	190706
30	369424
31	719956
32	1258251
33	2196855
34	4201958
35	8000409
36	14263679
37	25620508
38	48585009
39	91421253
40	165467590

[1, -1, 1, 1, 0, 0, 2, 3, 1, 2, 11, 17, 12, 25, 81, 127, 134, 276, 696, 1118, 1492, 3005, 6607, 10935, 16766, 33047, 67249, 114611, 190706, 369424, 719956, 1258251, 2196855, 4201958, 8000409, 14263679, 25620508, 48585009, 91421253, 165467590]

cp's OEIS Frontend

A025258 a(n) = a(1)a(n-1) + a(2)a(n-2) + ... + a(n-3)*a(3) for n >= 4, with initial terms 1, -1, 1, 1.

Table of values

List of values

cp's OEIS Frontend

A025258 a(n) = a(1)*a(n-1) + a(2)*a(n-2) + ... + a(n-3)*a(3) for n >= 4, with initial terms 1, -1, 1, 1.

Table of values

List of values

A025258 a(n) = a(1)a(n-1) + a(2)a(n-2) + ... + a(n-3)*a(3) for n >= 4, with initial terms 1, -1, 1, 1.